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Finding the Fourth Proportional to 216,967.32, 325,531.02 and 90,620.76

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Solution

The fourth proportional to 216,967.32, 325,531.02 and 90,620.76 is: 135,964.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,967.32 : 325,531.02 = 90,620.76 : x
  2. Step 2: Convert to fraction form
    216,967.32/325,531.02 = 90,620.76/x
  3. Step 3: Cross multiply
    216,967.32x = 325,531.02 × 90,620.76
  4. Step 4: Simplify right side
    216,967.32x = 29,499,868,435.98
  5. Step 5: Solve for x
    x = 29,499,868,435.98/216,967.32
  6. Step 6: Final answer
    x = 135,964.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.